Rotary pump



nventor Jan. 14, 1930. a. e. GASAL I 1,743,539

ROTARY PUMI? Filed April 23. 1928 2 Sheets-Sheet 1 4- 'kylamf i Aw 1V1 Mi,

Jan. 14, 1930. 7 GAsAL 1,743,539

' RRRRRR PUMP w v1IIlA/K %%%{//A 7 s II I] ghvuantoz Gag/Z07? 6. Gas aZ Patented Jan. 14, 1930 GAYL'OBD G. GASAL, OF CEDAR FALLS, IOWA.

Romany rm Application filed April 23, 1928. Serial No. 272,245.

-My invention relates to rotary pumps or motors of that type which embodies'a caslng or shell having a cylindrical chamber in which is operative a driving rotor carrying radial blades or vanes having a defined orbital movement with a resultant reciprocation of the blades or vanes in the guide slots formed in the rotor. In the conventional forms of such type of rotary pump, the outer edges of the blades have frictional contact with the inner cylmdrical surface of the casing chamber, or pintles on the inner edges of the vanes travel in tracks or follow the surfaces of cams, causing tremendous friction, producing rapid wear, and taking excessive power, Also, in such conventional forms of rotary pump, the .blades project materially beyond the periph cry of the rotor when they approach a given position, with the result that the resistance of the fluid on the exposed portions of the blades rock orcant the latter and cause them to bind acrossthe edges of their guideways with undue friction. The primary object of the present invention is to improve the construction of rotary pumps of the above type, so that the above mentioned friction with its resulting wearis practically eliminated.

In other words, a feature and advantage of the present improvement is to provide improved means for the effective hearing or supporting of the blades or vanes at all'positions thereof, so as to hold the blades or vanes at all Y times a proper distance from the inner cylindrical surface of the casing chamber, thereby 1' enabling them to run freely with respect to the rotor, relieving them of all frictional contact against the peripheral surface of the casing chamber, and consequently materially lreducing the wear.

The invention consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

same and the upper portion of the inner sur- In the drawings: Figure 1 is a side elevational; view, wit

one end cover removed, of a rotary pump embodying the present invention. I a

Figure 2 is a transverse section on line 22 of Figure 1.

Figure 3 is a longitudinal section on line 33 of Figure 2.

Figured: is a side elevational view of the 'rotor.

Figure 5 is a transverse section on line 55 of Figure 4; and

Figure 6 is an edge plan view of one of the blades or vanes.-

Referring more in detail to the drawings,

5 indicates a shell or casing which forms a cylindrical chamber 6 throu h which extends an eccentrically mounted s aft 7 on which issecured a rotor 8 having a diameter less than that of the chamber 6 and located ec-' centrically in the latter with its lower side running close to the contiguous portion of the'cylindrical inner wall of the shell 5 and leaving a material space between the top of the face of-the chamber 6. One side of the shell is provided with a connection 9, and the opposite side is provided with a connection 10, such connections being selectively capable of use as inlet and outlet connections and extending laterally from the peripheral wall of the shell 5. The rotor 8 is provided with a plurality of radial guide slots or recesses 11 extending from end to end in the rotor. In each guide slot 11 is slidably mounted a fiat blade or vane 12, which, when it is retracted, approaches the inner end of its guide slot, and as the rotor rotates, the blade moves outwardly to driving position, forming a movas able wallextending between the upper portion of the rotor 8 and the opposite spaced upper surface of the chamber 6.

It is desirable to prevent the blades 12 from having frictional contact with the inner 00 cylindrical surface of the chamber 6 and, at the same time, to prevent their binding on the transverse shoulders formed by the outer ends of the walls of the guide slots 11, and this is accomplished by the provision of means efiective to carry the blades as they pass the top portion of the inner cylindrical surface of chamber 6 during the operation of the pump. i

A preferred form of such means conslsts in the provision of blades 12 of such length that the 'major inner portions thereof are within the guide slots 11 when the blades are in their position of maximum pro'ection as shown at the top of Figure 3, an the provision of pintles 13 on the ends of the {blades 12 adjacent their outer edges, or materially vanes 12, the openings 14 being of sufficient and the pintles 13 are so fitted thereinthat length to allow the blades to pass the two centers. The openings 14 are so arranged the vanes are held at all times at proper distance from the surface of the chamber 6 to relieve them of all frictional contact with such surface. A further natural result is that the rings 15 and pintles 13 determine the or-i bital movement and position of the several blades or vanes in the operation of the pump.

In order to relieve pressure behind the sev-..

eral blades or vanes, the inner ends of the guide slots llare serially connected by means of arcuate slots 18 provided in the opposite ends of the rotor 8 concentric with and adjacent the axis of the latter.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

I claim:

in the shell adjacent the opposite ends of the rotor, said rings being formed with circumferentially arran ed arcuate slots, and pin-' tles on the ends of the blades operable within the respective registering slots in the runner rings, the peripheral outer edges of the runner rings having engagement with the inner peripheral wall of the shell. g

In testimony,whereof I aflix my signature.

GAYLORD G. GASAL.

In a rotary pump, a shell, a rotor eccentrically mounted therein, said rotor includlng a solid body formed witha central bore, an

spaced radial slots that extend inwardl from the periphery of the body to a point a jacent said bore, the body being formed with circumferentially'extending spaced arcuate slots in the opposite ends of the same, said arcuate slots being disposed concentric with and adj acent the bore of the body and aifording communication between the radial slots at the inner ends thereof, blades slidably arranged in the radial slots, and means to prevent the blades from having frictional contact with the inner cylindrical wall of the shell where the liquid passes through the pump comprising runner rings mounted for rotation with- 

